50 NORTH AMERICAN FLORA [VoLUME 33 
3. Centratherum muticum (H.B.K.) Less. Linnaea 4: 320. 1829. 
Ampbherephis mutica H.B.K. Nov. Gen. & Sp. 4:32. 1818. 
Baccharoides muticum Kuntze, Rev. Gen. 320. 1891. 
Stems thinly pubescent below, cinereous and branching above, 5—8 dm. high; leaf-blades 
rather thick and firm, narrowlv ovate or ovate-oblong, 15-20 mm. long, 5—7 mm. wide, sharply 
serrate, gradually attenuate at base, puberulent on both sides, resinous beneath; outer involu- 
cral scales equaling or a little longer than the heads, the intermediate acute or with short 
awns, the inner obtuse to rounded, not glandular-ciliate, glabrous below, glandular on the 
back toward the apex. 
TYPE LOCALITY: Colombia. 
DISTRIBUTION: Mexico and Central America; also in South America. 
ILLUSTRATION: H.B.K. Nov. Gen. & Sp. pl. 315. 
4. LACHNORHIZA A. Rich.; Sagra, Hist. Cuba 11: 34. 1850. 
Seapose, puberulent, perennial herbs, with leaves on winged petioles arising from a 
densely woolly crown and with 1—4 many-flowered Vernonza-like heads in a terminal corym- 
biform cluster. Involucral scales imbricate in a few series, glandular, the outer short, the inner 
much elongate and uniform in length. Receptacle flat, naked. Corolla tubular, regular, 
5-cleft, gradually enlarged upwards, glandular-dotted. Anthers sagittate. Style-branches 
slender. Achenes prismatic, with 10 low ribs, glabrous or nearly so. Pappus capillary, of 
numerous bristles in one series. 
Type species, Lachnorhiza piloselloides A. Rich. 
1. Lachnorhiza piloselloides A. Rich.; Sagra, Hist. Cuba 11: 34. 1850. 
Lachnorrhiza asteroides Griseb. Cat. Pl. Cub. 152. 1866. 
Vernonia piloselloides Maza, Anal. Soc. Esp. Hist. Nat. 19: 269. 1890. 
Vernonia piloselloides asteroides Maza, Anal. Soc. Esp. Hist. Nat. 19: 269. 1890. 
Leaf-blades linear-spatulate to oblong-spatulate, 5-14 cm. long including the petiole, 
1-2 em. wide, acute or obtuse, entire, gradually narrowed below into a margined pubescent 
petiole, essentially glabrous on both sides and more or less glandular-dotted, the lateral veins 
obscure; scape erect, puberulent, 15-40 cm. high, bearing a few subulate bracts; involucre 
campanulate, 8 mm. high; scales all erect, loosely imbricate in a few series, pubescent and 
glandular on the back, the outer triangular-lanceolate, the inner narrowly oblong to oblong- 
lanceolate, acute; achenes 4-5 mm. long, glabrous or nearly so on the ribs, densely resinous 
in the shallow furrows; pappus tawny, 7 mm. long. 
TYPE LOCALITY: Isle of Pines. 
DISTRIBUTION: Cuba and the Isle of Pines. 
5. LEIBOLDIA Schlecht. Linnaea 19: 742. 1847. 
Shrubs with pubescent or tomentose stems and large rugose ieaves usually scabrous 
above and tomentose beneath. Heads few, large, many (100 or more)-flowered, crowded in 
dense corymbiform clusters. Involucre broadly campanulate or hemispheric, the scales 
numerous, acuminate, imbricate in manyseries. Receptacle flat or subconvex, naked. Corolla 
regular, the tube slender, gradually enlarged upwards, with deeply 5-cleft limb. Anthers 
sagittate, obtuse at the base. Style-branches slender. Achenes glabrous, prominently 5-angled, 
without lower intermediate ribs, surmounted by a narrow or broad callus-ring. Pappus in 
2-3 series, capillary, its bristles all equal or nearly so, at least not in two unequal series. 
Type species, Vernonia Leiboldiana Schlecht. 
Seales prominently carinately nerved; achenes tipped with a narrow callus- -ring. 1. L. Leiboldiana. 
Scales not prominently nerved; achenes usually tipped with a broad callus-ring. 2. L. serrata. 
1. Leiboldia Leiboldiana (Schlecht.) Gleason, Bull. N. Y. Bot. Gard. 
4: 103. 1906. 
Vernonia Leiholdiana Schlecht. Linnaea 19: 742. 1847. 
Leiboldia ovata Schlecht. Linnaea 19: 742, as synonym. 1847. 
Cacalia Leiboldiana Kuntze, Rev. Gen. 970. 891. 
